/*------------------------------------------------------------------------------
TEST.C:  ISD51 Demo for classic 8051 devices like Philips 89C51RD2/89C66x

Copyright 2002 - 2003 Keil Software, Inc.
------------------------------------------------------------------------------*/

#include <reg9e5.h>
#include <intrins.h>
#include <absacc.h>
#include "ISD51.h"

sbit LED_FLAG=P0^4;
void delay(void);
unsigned char j;

unsigned char code testarray[] = "Some Text";
#if 0   // uncomment this function to verify serial communication
/*
 * Test Function: verify serial communication with HyperTerminal
 */
 void delay(void) 
{
  long i;
  
  i = 0x800;
  while(i--);
}

void TestSerial (void)  
{
  char c = 'A';

  TI = 1;
  while (1)  
  {
    if (RI)  
    {
      c = SBUF;
      RI = 0;
    }
    while (!TI);
    TI = 0;
    delay();
    SBUF = c;
  }
}

#endif

unsigned char SpiReadWrite(unsigned char b)
{
    EXIF &= ~0x20;                  // Clear SPI interrupt
    SPI_DATA = b;                   // Move byte to send to SPI data register
    while((EXIF & 0x20) == 0x00)    // Wait until SPI hs finished transmitting
        ;
    return SPI_DATA;
}

void main (void)  
{
  unsigned int i, tmp;
  
  P0_DIR = 0x02;	// P0.1 (RxD) is an input
  P0_ALT = 0x06;	// Select alternate functions on pins P0.1 and P0.2

  T2CON   = 0x34;      /* Use Timer 2 as baudrate generator  */
  RCAP2H  = 0xFF;
  RCAP2L  = 0xF7;      /* 57600 baud @ 16MHz                  */
  SCON    = 0x50;      /* enable serial uart & receiver      */

  LED_FLAG=0;
  
  SPICLK = 1;
  SPI_CTRL = 0x02;               // Connect internal SPI controller to Radio
  
  // Switch to 16MHz clock:	//config nRF9E5  clock
  RACSN = 0;
  SpiReadWrite(RRC | 0x09);
  tmp = SpiReadWrite(0) | 0x0C;
  RACSN = 1;

  RACSN = 0;
  SpiReadWrite(WRC | 0x09);
  SpiReadWrite(tmp);
  RACSN = 1;
  
  LED_FLAG=1;
  EA = 1;              /* Enable global interrupt flag       */

TestSerial ();      // uncomment this function to verify serial communication
 
#if 0   // init ISD51 and start user program until the uVision2 Debugger connects
  	ISDinit ();        // initialize uVision2 Debugger and continue program run
#endif

#if 0   // init ISD51 and wait until the uVision2 Debugger connects
  	ISDwait ();        // wait for connection to uVision2 Debugger
#endif

  for (i = 0; i < sizeof (testarray); i++)  
  {
   	j = testarray[i];
  }

  while (1)  
  {
#if 1   // init ISD51 only when the uVision2 Debugger tries to connect
    	ISDcheck();      // initialize uVision2 Debugger and continue program run
#endif
	_nop_();
	_nop_();
	LED_FLAG=0;
        _nop_();
	_nop_();
	LED_FLAG=1;
	_nop_();
	_nop_();
#if 0   			// you may use ISDbreak when ISD51 is started with ISDcheck or ISDwait
	ISDbreak ();  	// hard coded stop (breakpoint)
#endif
	_nop_();
	_nop_();
	_nop_();
  }
}